The concept of law is essentially a matter of social fact.

Being brave isn’t the absence of fear. Being brave is having that fear but finding a way through it.

我不是光明，我是黑暗。

I’m a great believer in solving hard problems by using a checklist. You need to get all the likely and unlikely answers before you; otherwise it’s easy to miss something important.

除了鲜血、劳作、泪水和汗水，我没有其他可奉献的。

化学是关于连接的科学，无论是字面上还是隐喻上。